What Is The Cause Of The Glass Bottle Shoulder Defect?

Here is Customized Beverage Bottles Factory talking about What is the cause of the glass bottle shoulder defect. 

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Glass bottle shoulder defect

1.  Shoulder splitting. 

There are surface cracks on the shoulders. The gob temperature is too high or too low.

The initial mold or the forming mold is not opened smoothly.

The blowing pressure is too high.

The molding die is not properly matched to the mold base.

Forming die clamps are severely worn.

The molding dies temperature is too high.

2.  Insufficient bottle shoulder (slung shoulder, concave). 

The shoulder of the bottle is not fully formed.

The gob temperature is too high or too low.

The shape of the gob is not good or the thin material is not correct, and the friction on the material path is mostly.

The position of the blow head is incorrect or the blow pressure is too small.

The blowing time is too short.

The blown air pressure is too high or the time is too long, and the initial shape is too hard.

There is not enough time for reheating.

The initial mold or molding die is too cold